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Synthesis of Conjugated Polymers Containing Diketopyrrolopyrrole(DPP)Building Block and the Photophysical Study

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Chinese Journal of Polymer Science 2019年第11期37卷 1092-1098页

作者： Ying-Zhong Wu Yi-chen Zhang jia-jun chen Li-Juan Fan Department of Polymer Science and Engineering College of Chemistry Chemical Engineering and Materials Science Soochow University

Sonogashira coupling of two different diketopyrrolopyrrole (DPP)-containing dihaloarenes with the same aromatic bisalkyne resulted in two new conjugated polymers with the same backbone but different pendant groups on the DPP moiety. The polymers were found to have designed chemical structures via structural characterizations in comparison with three monomers. The molecular weight measurement further demonstrated the formation of polymers with polydispersity index around 2, consistent with the polycondensation nature of the polymerization based on Sonogashira coupling. Both polymers could dissolve in many organic solvents, and the one with long alkyl side group on DPP moiety had better solubility. Photophysical investigation showed that both polymers had typical absorption/emission of conjugated polymers, and varying the solvent did not have large influence. Compared with other polar solvents, toluene reduced the quantum yield of fluorescence of the polymers, especially for the one with long alkyl pedant group, accompanying with slight red-shift in absorption/emission. The difference in the absorption/emission wavelengths between the polymers was similar to that between the corresponding monomers. Adding water into the THF solution of polymers reduced the emission intensity but no redshift was observed. Discussion about the structure-property relationships was carried out in detail.

关键词： Conjugated polymer Diketopyrrolopyrrole Building block Sonogashira coupling Photophysics

Role of radiative and convective heat transfer during heating of an ingot product in a tubular furnace:experiment and simulation

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Journal of Iron and Steel Research International 2022年第12期29卷 1978-1985页

作者： Wen-chao Yang Yang Zhou jian Zhang Huan Liu Ying-jie Ren jia-jun chen Xian-guang Zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing 100083China chengdu Advanced Metal Materials Industrial Technolgy Research Institute Co. Ltd.Chengdu 610300SichuanChina

Convective heat transfer and radiative heat transfer are two essential heat transfer modes in the heating process of steel;it is important to understand the role of them during the heating process *** effects of the convective and radiative heat transfer during the heating process of a cast ingot in a tubular furnace have been studied by the designed natural and forced convection experiments and mathematical *** heating time for the center of the ingot to reach the furnace temperature is decreased with the increase in furnace *** to the experimental and simulation results,a model is proposed regarding the role of radiative and convective heat transfer in the heating *** low temperature,the convective heat transfer plays a dominant role,while at high temperature,the influence of radiative heat transfer is *** a critical temperature exists between *** forced convective heat transfer can enhance the influence of the convective heat *** critical temperature can be shifted to higher temperatures.

关键词： Reheating Tubular furnace Cast ingot Convective heat transfer Radiative heat transfer

Revealing layer-dependent interlayer interactions by doping effect on graphene in WSe_(2)/N-layer graphene heterostructures using Raman and photoluminescence spectroscopy

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Rare Metals 2022年第11期41卷 3646-3653页

作者： Ya-Bing Shan Xiao-Fei Yue jia-jun chen Jin-Kun Han Garel Ekoya Lai-Gui Hu Ran Liu Zhi-jun Qiu Chun-Xiao Cong School of Information Science and Technology Fudan UniversityShanghai200433China Yiwu Research Institute of Fudan University Yiwu322000China Academy for Engineering and Technology Fudan UniversityShanghai200433Chin

Assembling layered materials in the form of vertically stacked heterostructures has enabled the combination of various properties from different two-dimensional(2D)materials,which is receiving a great deal of attention for investigating novel physical phenomena and emerging a facile way to fabricate promising highly tailored architectures.

关键词： graphene layer effect

Clinical risk factors for preterm birth and evaluating maternal psychology in the postpartum period

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World Journal of Psychiatry 2024年第5期14卷 661-669页

作者： jia-jun chen Xue-Jin chen Qiu-Min She Jie-Xi Li Qiu-Hong Luo Department of Clinical Laboratory Shenzhen Bao’an District Songgang People’s HospitalShenzhen 518000Guangdong ProvinceChina Department of Otolaryngology Head and Neck Surgery Outpatient Shenzhen Children’s HospitalShenzhen 518000Guangdong ProvinceChina Department of Prevention and Health Care Shenzhen Bao’an District Songgang People’s HospitalShenzhen 518000Guangdong ProvinceChina Department of Obstetrics Shenzhen Bao’an District Songgang People’s HospitalShenzhen 518000Guangdong ProvinceChina

BACKGROUND Although the specific pathogenesis of preterm birth(PTB)has not been thoroughly clarified,it is known to be related to various factors,such as pregnancy complications,maternal socioeconomic factors,lifestyle habits,reproductive history,environmental and psychological factors,prenatal care,and nutritional *** has serious implications for newborns and families and is associated with high mortality and ***,the prediction of PTB risk can facilitate early intervention and reduce its resultant adverse *** To analyze the risk factors for PTB to establish a PTB risk prediction model and to assess postpartum anxiety and depression in *** A retrospective analysis of 648 consecutive parturients who delivered at Shenzhen Bao’an District Songgang People’s Hospital between January 2019 and January 2022 was *** to the diagnostic criteria for premature infants,the parturients were divided into a PTB group(n=60)and a full-term(FT)group(n=588).Puerperae were assessed by the Self-rating Anxiety Scale(SAS)and Self rating Depression Scale(SDS),based on which the mothers with anxiety and depression symptoms were screened for further *** factors affecting PTB were analyzed by univariate analysis,and the related risk factors were identified by logistic *** According to univariate analysis,the PTB group was older than the FT group,with a smaller weight change and greater proportions of women who underwent artificial insemination and had gestational diabetes mellitus(P<0.05).In addition,greater proportions of women with reproductive tract infections and greater white blood cell(WBC)counts(P<0.05),shorter cervical lengths in the second trimester and lower neutrophil percentages(P<0.001)were detected in the PTB group than in the FT *** PTB group exhibited higher postpartum SAS and SDS scores than did the FT group(P<0.0001),with a higher number of mothers experiencing anxiety and depress

关键词： Preterm birth Risk factors Postpartum psychological state Risk model Prediction

Oxidation and internal nitridation behaviors of a Ni-based superalloy Rene 65 during high-temperature homogenization

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Journal of Iron and Steel Research International 2023年第8期30卷 1622-1632页

作者： Xian-guang Zhang jia-jun chen Yang Zhou Lang Shui Dong-ping Xiao jian-hui Fu Wen-chao Yang Huan Liu Ying-jie Ren Peng Shi jian Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing(USTB)Beijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing 100083China chengdu Advanced Metal Materials Industrial Technology Institute Co. Ltd.Chengdu 610300SichuanChina Iron and State Key Laboratory of Metal Material for Marine Equipment and Application Anshan 114009LiaoningChina Pangang Group Research Institute Co. Ltd.Panzhihua 617000SichuanChina

Homogenization heat treatment is a key process to remove the micro-segregation and re-dissolve the undesired phases for wrought *** oxidation behavior of the wrought superalloy during the high-temperature homogenization process,however,was rarely *** oxidation film evolution and growth kinetics of an as-cast superalloy Rene 65 during the homogenization were systematically *** oxide film consists of Cr_(2)O_(3) external oxidation layer and dendritic TiO_(2) and Al_(2)O_(3) internal oxidation *** the growth kinetics of the oxide film followed a parabolic *** nitridation occurs during the oxidation process,and TiN is apparently formed at the tip of internal oxidation *** originally formed TiN can be transformed into TiO_(2) or retained with the progress of ***,the TiN is newly formed in the deeper matrix at the new oxidation-layer *** analyses revealed that there is a competition between the oxidation and *** can occur when the partial pressure of nitrogen exceeds the threshold of nitridation and the critical partial pressure ratio of nitrogen and oxygen.

关键词： Nickel-based superalloy Homogenization Oxidation Kinetics Internal nitridation Thermodynamics

行政审批生效合同制度之存废及其过渡性安排研究

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同济大学学报（社会科学版） 2015年第3期26卷 108-118页

作者：贾辰君同济大学法学院上海200092

行政审批生效合同制度在司法实践中出现很多问题,其中关键的问题是报批义务的性质以及违反报批义务应承担什么样的责任,学界对此有较大的争论。目前的研究集中在解释论的范围,这就造成了研究的局限性。因为,如果立法本身存在重大问题,... 详细信息

行政审批生效合同制度在司法实践中出现很多问题,其中关键的问题是报批义务的性质以及违反报批义务应承担什么样的责任,学界对此有较大的争论。目前的研究集中在解释论的范围,这就造成了研究的局限性。因为,如果立法本身存在重大问题,纯粹运用解释论是难以奏效的,应结合目前国家深化行政审批制度改革的大背景,从立法论的角度重新审视这一制度。首先分析该制度的立法和研究现状,其次研究该制度的存废问题,最后对该制度废除前做出过渡性安排,实现法律的公平和正义。

关键词：行政审批合同生效报批义务制度存废过渡性安排

我国规制ICT产业标准必要专利挟持的强度选择

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科学学研究 2018年第6期36卷 974-983页

作者：贾辰君河南财经政法大学知识产权学院/民商经济法学院

近年来,ICT产业标准必要专利挟持的情况在我国不断出现,对标准必要专利挟制采取何种强度的规制,是进行具体法律规制建议的基础和起点。规制强度的确定,可以为具体的标准必要专利法律规制提供价值导向和参考。在选择规制强度的时候,应该... 详细信息

近年来,ICT产业标准必要专利挟持的情况在我国不断出现,对标准必要专利挟制采取何种强度的规制,是进行具体法律规制建议的基础和起点。规制强度的确定,可以为具体的标准必要专利法律规制提供价值导向和参考。在选择规制强度的时候,应该分析以下因素：我国ICT企业标准必要专利的国际竞争力状况,ICT产业标准必要专利的自身特点,欧美对ICT产业标准必要专利挟持的法律规制强度状况等。基于对上述因素的分析,建议我国对ICT产业标准必要专利挟持的规制采取较高强度。较高强度的规制有利于减少标准必要专利挟持的发生,有利于维护我国ICT企业的利益,有利于保护公共利益。

关键词：标准必要专利挟持 ICT产业规制强度

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan Yang Han jia Tuo Liu Yuzhen Yang jun Yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. Here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

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论我国知识产权公共服务供给的现状和改进

科学管理研究 2015年第2期33卷 5-8页

作者：贾辰君同济大学法学院上海200092

随着科学技术的进步,知识产权越来越重要。整个社会对知识产权越来越重视,政府在很多方面为社会公众和企业提供了知识产权公共服务,这些知识产权公共服务在一定程度上满足了社会公众的需求,促进了企业的知识产权管理和创新。但由于我国... 详细信息

随着科学技术的进步,知识产权越来越重要。整个社会对知识产权越来越重视,政府在很多方面为社会公众和企业提供了知识产权公共服务,这些知识产权公共服务在一定程度上满足了社会公众的需求,促进了企业的知识产权管理和创新。但由于我国知识产权公共服务起步较晚和投入相对不足,目前的知识产权公共服务不能完全满足社会公众和企业的需求。政府和其他社会组织应该不断改进知识产权公共服务体制,优化知识产权公共服务的质量和数量,最大限度满足社会公众和企业的需求。

关键词：知识产权公共服务供给